smelting black sands to retrieve gold Gold Refining
Jan 20 2019 · 4 beat the black sand with a small hammer 5 the black sand grains shatter 6 any gold is released 7 any gold is either tiny and visible only with a x40 to x100 stereozoom microscope or is big enough to be beaten flat and rendered large enough to be seen by eye in bright light 8 use a feather to gently scrape away the shattered black sand